Progressive Dynamics:
1) Good about going to boost mode (14.4 volts) when expected and will hold boost up to four hours before dropping to normal.
2) Available in 14.8 volts for charging GC2 batteries.
3) Tends to have have voltage or current sag near full output.
4) Wizard allows manual control of the charging mode.
5) Complete 120/12 volt distribution center is available.
Boondocker:
1) Always starts in boost mode (14.6 volts?) and drops to normal within 15 minutes of hitting that set point.
2) Available with manually adjustable voltage if desired.
Both have an MBA (main board assembly) for direct WFCO replacement.
Both have a short boost mode about once a day for improved maintenance during storage mode.
I would tend to go a little smaller with the Boondocker due to the charging profile and a little large on the PD due to the amps sagging a bit at max voltage. Going to also depend on your other equipment, expectations and camping style. Either are far and away better than the WFCO in all conditions.
